"What’s particularly special about Edinburgh’s Old Town is how relatively unchanged it is from its Medieval past. Walking through its ancient streets is like walking through time itself, and Mary King’s Close is one of the best-preserved slices of history in the city. Closes—or alleyways—like Mary King’s were once teeming with people, vermin, crime, and, inevitably, the Plague. Things were so filthy in the 18th century that eventually the city decided to build its new Royal Exchange building (now the City Chambers) on top of the existing city, rather than next to it, thereby sentencing streets like Mary King’s to a lifetime of enclosed darkness. The last resident moved out in 1902; today, tour guides dressed as former residents lead groups around the dark space, where there are still eight-story buildings in situ, all completely underground. Just make sure to book your ticket ahead—it's very popular, and deservedly so." - Freya Herring
